Size and Customization Guide blades

Choosing Bifin Blade Stiffness
Blade stiffness depends on your height, weight, technique, experience, training goals, and blade size. Below are general tips on how to choose the right stiffness. If you are not sure, e-mail with a video attached of one of your dives for a recommendation.

Soft: Suitable for smaller and lighter freedivers with less body strength and for experienced freedivers with excellent ankle-driven technique. If a freediver has more lower-body strength, they can choose a medium stiffness. Soft blades are more economic in terms of energy consumption, but require good ankle-driven technique to be effective.

Medium: Suitable for larger and heavier freedivers, freedivers with more lower-body strength, or freedivers who need more power. Freedivers who are heavier and have not trained to use ankle-driven technique should choose medium stiffness with a quad-driven technique.

Hard: Suitable for larger and heavier freedivers or freedivers with a lot of lower-body strength who want more speed and propulsion and are willing to use more energy consumption per kick. Hard blades require less frequency and more amplitude.